APA

Helander A., von Wachenfeldt J., Hiltunen A., Beck O., Liljeberg P. & Borg S. (19991012). Comparison of urinary 5-hydroxytryptophol, breath ethanol, and self-report for detection of recent alcohol use during outpatient treatment: a study on methadone patients. : Drug and alcohol dependence.

Chicago

Helander A, von Wachenfeldt J, Hiltunen A, Beck O, Liljeberg P and Borg S. 19991012. Comparison of urinary 5-hydroxytryptophol, breath ethanol, and self-report for detection of recent alcohol use during outpatient treatment: a study on methadone patients. : Drug and alcohol dependence.

Harvard

Helander A., von Wachenfeldt J., Hiltunen A., Beck O., Liljeberg P. and Borg S. (19991012). Comparison of urinary 5-hydroxytryptophol, breath ethanol, and self-report for detection of recent alcohol use during outpatient treatment: a study on methadone patients. : Drug and alcohol dependence.

MLA

Helander A, von Wachenfeldt J, Hiltunen A, Beck O, Liljeberg P and Borg S. Comparison of urinary 5-hydroxytryptophol, breath ethanol, and self-report for detection of recent alcohol use during outpatient treatment: a study on methadone patients. : Drug and alcohol dependence. 19991012.